 
(* ::Section:: *)
(* RHO *)
(* ::Text:: *)
(*RHO[i] with i from 1 to 4 is an abbreviation for the 4 operators (eq. (3.2.17) -- (3.2.20)) defined in R.Hambergs thesis. The Lorentz indices are suppressed. The explicit expressions may be recovered by RHO[i, mu, nu, p]..*)


(* ::Subsection:: *)
(* See also *)
(* ::Text:: *)
(*RHI.*)



(* ::Subsection:: *)
(* Examples *)


